models/BookcaseItem: make shelf non-nullable

cli: make devscripts subcommand more accessible
models/migrations: redo initial migration
2024-07-31 22:36:12 +02:00 · 2024-07-28 14:32:13 +02:00 · 2024-07-28 14:12:45 +02:00 · 2024-07-28 14:09:40 +02:00 · 2024-07-27 23:14:27 +02:00 · 2024-07-27 22:24:34 +02:00
33 changed files with 1411 additions and 222 deletions
--- a/README.md
+++ b/README.md
@ -42,44 +42,4 @@ Unless provided through the `--config` flag, program will automatically look for
 - `~/.config/worblehat/config.toml`
 - `/var/lib/worblehat/config.toml`

-Run `poetry run worblehat --help` for more info
-
-## TODO List
-
-### Setting up a database with all of PVVs books
-
- [ ] Create postgres database
- [ ] Model all bookshelfs
- [ ] Scan in all books
-
-### Cli version of the program (this is currently being worked on)
-
- [X] Ability to pull data from online sources with ISBN
- [X] Ability to create and update bookcases
- [X] Ability to create and update bookcase shelfs
- [X] Ability to create and update bookcase items
- [X] Ability to borrow and deliver items
- [ ] Ability to borrow and deliver multiple items at a time
- [X] Ability to enter the queue for borrowing an item
- [ ] Ability to extend a borrowing, only if no one is behind you in the queue
- [ ] Ability to list borrowed items which are overdue
- [~] Ability to search for items
- [ ] Ability to print PVV-specific labels for items missing a label, or which for any other reason needs a custom one
- [X] Ascii art of monkey with fingers in eyes
-
-### Deadline daemon
-
- [X] Ability to be notified when deadlines are due
- [ ] Ability to be notified when books are available
- [ ] Ability to have expiring queue positions automatically expire
-
-### Web version of the program
-
- [ ] Ability for PVV members to search for books through the PVV website
-
-## Points of discussion
-
- Should this project run in a separate tty-instance on Dibblers interface, or should they share the tty with some kind of switching ability?
-After some discussion with other PVV members, we came up with an idea where we run the programs in separate ttys, and use a set of large mechanical switches connected to a QMK-flashed microcontroller to switch between them.
-
- Workaround for not being able to represent items with same ISBN and different owner: if you are absolutely adamant about placing your item at PVV while still owning it, even though PVV already owns a copy of this item, please print out a new label with a "PVV-ISBN" for it
+Run `poetry run worblehat --help` for more info
--- a/config-template.toml
+++ b/config-template.toml
@ -33,5 +33,8 @@ from = 'worblehat@pvv.ntnu.no'
 subject_prefix = '[Worblehat]'

 [deadline_daemon]
-warn_days_before_borrow_deadline = [ "5", "1" ]
-warn_days_before_expiring_queue_position_deadline = [ "3", "1" ]
+enabled = true
+dryrun = false
+warn_days_before_borrowing_deadline = [ 5, 1 ]
+days_before_queue_position_expires = 14
+warn_days_before_expiring_queue_position_deadline = [ 3, 1 ]
--- a/data/arbeidsrom_smal_hylle_5.csv
+++ b/data/arbeidsrom_smal_hylle_5.csv
@ -1,33 +1,29 @@
-isbn, note, bookcase, shelf
-9780486809038, emily riehl, arbeidsrom_smal, 5
-9781568811307, winning ways, arbeidsrom_smal, 5
-9780486458731, cardano, arbeidsrom_smal, 5
-9780486462394, alg topo, arbeidsrom_smal, 5
-9780582447585, formulae, arbeidsrom_smal, 5
-9780486466668, theory of numbers, arbeidsrom_smal, 5
-9780486462431, conv surf, arbeidsrom_smal, 5
-9780486449685, math fun and earnest, arbeidsrom_smal, 5
-9780486417103, lin prog, arbeidsrom_smal, 5
-9780130892393, complex analysis, arbeidsrom_smal, 5
-9781292024967, abstract alg, arbeidsrom_smal, 5
-9780471728979, kreyzig, arbeidsrom_smal, 5
-9781847762399, calc 1, arbeidsrom_smal, 5
-9781847762399, calc 1 again, arbeidsrom_smal, 5
-9781787267763, calc 1 nome, arbeidsrom_smal, 5
-9781787267770, calc 2 nome, arbeidsrom_smal, 5
-9780199208258, non lin ode, arbeidsrom_smal, 5
-9788251915953, tabeller, arbeidsrom_smal, 5
-9788251915953, taeller 2, arbeidsrom_smal, 5
-9788251915953, tabeller 3, arbeidsrom_smal, 5
-9788251915953, tabeller 4, arbeidsrom_smal, 5
-9780750304009, fractals and chaos, arbeidsrom_smal, 5
-9788241902116, geometri, arbeidsrom_smal, 5
-9781620402788, simpsons, arbeidsrom_smal, 5
-9781846683459, math curiosities, arbeidsrom_smal, 5
-9789810245344, fuzzy logic, arbeidsrom_smal, 5
-9781429224048, vect calc, arbeidsrom_smal, 5
-9780122407611, gambling, arbeidsrom_smal, 5
-9788278220054, rottman slitt, arbeidsrom_smal, 5
-9780321748232, prob and stat, arbeidsrom_smal, 5
-9780387954752, stats with r, arbeidsrom_smal, 5
-9781568814421, maths by exp, arbeidsrom_smal, 5
+isbn,note,bookcase,shelf
+9780486809038,emily riehl,arbeidsrom_smal,5
+9781568811307,winning ways,arbeidsrom_smal,5
+9780486458731,cardano,arbeidsrom_smal,5
+9780486462394,alg topo,arbeidsrom_smal,5
+9780582447585,formulae,arbeidsrom_smal,5
+9780486466668,theory of numbers,arbeidsrom_smal,5
+9780486462431,conv surf,arbeidsrom_smal,5
+9780486449685,math fun and earnest,arbeidsrom_smal,5
+9780486417103,lin prog,arbeidsrom_smal,5
+9780130892393,complex analysis,arbeidsrom_smal,5
+9781292024967,abstract alg,arbeidsrom_smal,5
+9780471728979,kreyzig,arbeidsrom_smal,5
+9781847762399,calc 1,arbeidsrom_smal,5
+9781787267763,calc 1 nome,arbeidsrom_smal,5
+9781787267770,calc 2 nome,arbeidsrom_smal,5
+9780199208258,non lin ode,arbeidsrom_smal,5
+9788251915953,tabeller,arbeidsrom_smal,5
+9780750304009,fractals and chaos,arbeidsrom_smal,5
+9788241902116,geometri,arbeidsrom_smal,5
+9781620402788,simpsons,arbeidsrom_smal,5
+9781846683459,math curiosities,arbeidsrom_smal,5
+9789810245344,fuzzy logic,arbeidsrom_smal,5
+9781429224048,vect calc,arbeidsrom_smal,5
+9780122407611,gambling,arbeidsrom_smal,5
+9788278220054,rottman slitt,arbeidsrom_smal,5
+9780321748232,prob and stat,arbeidsrom_smal,5
+9780387954752,stats with r,arbeidsrom_smal,5
+9781568814421,maths by exp,arbeidsrom_smal,5
--- a/flake.lock
+++ b/flake.lock
@ -2,16 +2,16 @@
  "nodes": {
    "nixpkgs": {
      "locked": {
-        "lastModified": 1683014792,
-        "narHash": "sha256-6Va9iVtmmsw4raBc3QKvQT2KT/NGRWlvUlJj46zN8B8=",
+        "lastModified": 1714272655,
+        "narHash": "sha256-3/ghIWCve93ngkx5eNPdHIKJP/pMzSr5Wc4rNKE1wOc=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "1a411f23ba299db155a5b45d5e145b85a7aafc42",
+        "rev": "12430e43bd9b81a6b4e79e64f87c624ade701eaf",
        "type": "github"
      },
      "original": {
        "id": "nixpkgs",
-        "ref": "nixos-unstable",
+        "ref": "nixos-23.11",
        "type": "indirect"
      }
    },
--- a/flake.nix
+++ b/flake.nix
@ -1,23 +1,42 @@
 {
-  # inputs.nixpkgs.url = "nixpkgs/nixos-22.11";
-  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+  inputs.nixpkgs.url = "nixpkgs/nixos-23.11";

  outputs = { self, nixpkgs }: let
-    system = "x86_64-linux";
-    pkgs = nixpkgs.legacyPackages.${system};
-    inherit (pkgs) lib;
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in f system pkgs);
  in {
-    apps.${system} = let
-      app = program: {
+    apps = forAllSystems (system: pkgs: let
+      mkApp = program: {
        type = "app";
        inherit program;
      };
    in {
-      default = self.apps.${system}.worblehat;
-      worblehat = app "${self.packages.${system}.worblehat}/bin/worblehat";
-    };
+      default = mkApp self.packages.${system}.default;
+    });

-    packages.${system} = {
+    devShells = forAllSystems (_: pkgs: {
+      default = pkgs.mkShell {
+        packages = with pkgs; [
+          poetry
+          sqlite
+        ];
+        shellHook = ''
+          poetry install
+          poetry shell && exit
+        '';
+      };
+    });
+
+    overlays.default = final: prev: self.packages.${final.system};
+
+    packages = forAllSystems (system: pkgs: {
      default = self.packages.${system}.worblehat;
      worblehat = with pkgs.python3Packages; buildPythonPackage {
        pname = "worblehat";
@ -38,6 +57,6 @@
          sqlalchemy
        ];
      };
-    };
+    });
  };
-}
+}
--- a/poetry.lock
+++ b/poetry.lock
@ -1,10 +1,9 @@
-# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.7.1 and should not be changed by hand.

 [[package]]
 name = "alembic"
 version = "1.10.4"
 description = "A database migration tool for SQLAlchemy."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -20,11 +19,31 @@ typing-extensions = ">=4"
 [package.extras]
 tz = ["python-dateutil"]

+[[package]]
+name = "beautifulsoup4"
+version = "4.12.3"
+description = "Screen-scraping library"
+optional = false
+python-versions = ">=3.6.0"
+files = [
+    {file = "beautifulsoup4-4.12.3-py3-none-any.whl", hash = "sha256:b80878c9f40111313e55da8ba20bdba06d8fa3969fc68304167741bbf9e082ed"},
+    {file = "beautifulsoup4-4.12.3.tar.gz", hash = "sha256:74e3d1928edc070d21748185c46e3fb33490f22f52a3addee9aee0f4f7781051"},
+]
+
+[package.dependencies]
+soupsieve = ">1.2"
+
+[package.extras]
+cchardet = ["cchardet"]
+chardet = ["chardet"]
+charset-normalizer = ["charset-normalizer"]
+html5lib = ["html5lib"]
+lxml = ["lxml"]
+
 [[package]]
 name = "blinker"
 version = "1.6.2"
 description = "Fast, simple object-to-object and broadcast signaling"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -32,11 +51,134 @@ files = [
    {file = "blinker-1.6.2.tar.gz", hash = "sha256:4afd3de66ef3a9f8067559fb7a1cbe555c17dcbe15971b05d1b625c3e7abe213"},
 ]

+[[package]]
+name = "bs4"
+version = "0.0.2"
+description = "Dummy package for Beautiful Soup (beautifulsoup4)"
+optional = false
+python-versions = "*"
+files = [
+    {file = "bs4-0.0.2-py2.py3-none-any.whl", hash = "sha256:abf8742c0805ef7f662dce4b51cca104cffe52b835238afc169142ab9b3fbccc"},
+    {file = "bs4-0.0.2.tar.gz", hash = "sha256:a48685c58f50fe127722417bae83fe6badf500d54b55f7e39ffe43b798653925"},
+]
+
+[package.dependencies]
+beautifulsoup4 = "*"
+
+[[package]]
+name = "certifi"
+version = "2024.7.4"
+description = "Python package for providing Mozilla's CA Bundle."
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "certifi-2024.7.4-py3-none-any.whl", hash = "sha256:c198e21b1289c2ab85ee4e67bb4b4ef3ead0892059901a8d5b622f24a1101e90"},
+    {file = "certifi-2024.7.4.tar.gz", hash = "sha256:5a1e7645bc0ec61a09e26c36f6106dd4cf40c6db3a1fb6352b0244e7fb057c7b"},
+]
+
+[[package]]
+name = "charset-normalizer"
+version = "3.3.2"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+optional = false
+python-versions = ">=3.7.0"
+files = [
+    {file = "charset-normalizer-3.3.2.tar.gz", hash = "sha256:f30c3cb33b24454a82faecaf01b19c18562b1e89558fb6c56de4d9118a032fd5"},
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 name = "click"
 version = "8.1.3"
 description = "Composable command line interface toolkit"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -51,7 +193,6 @@ colorama = {version = "*", markers = "platform_system == \"Windows\""}
 name = "colorama"
 version = "0.4.6"
 description = "Cross-platform colored terminal text."
-category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
 files = [
@ -63,7 +204,6 @@ files = [
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 version = "2.3.2"
 description = "A simple framework for building complex web applications."
-category = "main"
 optional = false
 python-versions = ">=3.8"
 files = [
@ -86,7 +226,6 @@ dotenv = ["python-dotenv"]
 name = "flask-admin"
 version = "1.6.1"
 description = "Simple and extensible admin interface framework for Flask"
-category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@ -106,7 +245,6 @@ azure = ["azure-storage-blob"]
 name = "flask-sqlalchemy"
 version = "3.0.3"
 description = "Add SQLAlchemy support to your Flask application."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -122,7 +260,6 @@ SQLAlchemy = ">=1.4.18"
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 version = "2.0.2"
 description = "Lightweight in-process concurrent programming"
-category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
 files = [
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@ -192,11 +333,21 @@ files = [
 docs = ["Sphinx", "docutils (<0.18)"]
 test = ["objgraph", "psutil"]

+[[package]]
+name = "idna"
+version = "3.7"
+description = "Internationalized Domain Names in Applications (IDNA)"
+optional = false
+python-versions = ">=3.5"
+files = [
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+    {file = "idna-3.7.tar.gz", hash = "sha256:028ff3aadf0609c1fd278d8ea3089299412a7a8b9bd005dd08b9f8285bcb5cfc"},
+]
+
 [[package]]
 name = "isbnlib"
 version = "3.10.14"
 description = "Extract, clean, transform, hyphenate and metadata for ISBNs (International Standard Book Number)."
-category = "main"
 optional = false
 python-versions = "*"
 files = [
@ -208,7 +359,6 @@ files = [
 name = "itsdangerous"
 version = "2.1.2"
 description = "Safely pass data to untrusted environments and back."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -220,7 +370,6 @@ files = [
 name = "jinja2"
 version = "3.1.2"
 description = "A very fast and expressive template engine."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -238,7 +387,6 @@ i18n = ["Babel (>=2.7)"]
 name = "mako"
 version = "1.2.4"
 description = "A super-fast templating language that borrows the best ideas from the existing templating languages."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -258,7 +406,6 @@ testing = ["pytest"]
 name = "markupsafe"
 version = "2.1.2"
 description = "Safely add untrusted strings to HTML/XML markup."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -318,7 +465,6 @@ files = [
 name = "pastel"
 version = "0.2.1"
 description = "Bring colors to your terminal."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@ -330,7 +476,6 @@ files = [
 name = "poethepoet"
 version = "0.20.0"
 description = "A task runner that works well with poetry."
-category = "dev"
 optional = false
 python-versions = ">=3.8"
 files = [
@ -349,7 +494,6 @@ poetry-plugin = ["poetry (>=1.0,<2.0)"]
 name = "psycopg2-binary"
 version = "2.9.6"
 description = "psycopg2 - Python-PostgreSQL Database Adapter"
-category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@ -417,11 +561,42 @@ files = [
    {file = "psycopg2_binary-2.9.6-cp39-cp39-win_amd64.whl", hash = "sha256:f6a88f384335bb27812293fdb11ac6aee2ca3f51d3c7820fe03de0a304ab6249"},
 ]

+[[package]]
+name = "requests"
+version = "2.32.3"
+description = "Python HTTP for Humans."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "requests-2.32.3-py3-none-any.whl", hash = "sha256:70761cfe03c773ceb22aa2f671b4757976145175cdfca038c02654d061d6dcc6"},
+    {file = "requests-2.32.3.tar.gz", hash = "sha256:55365417734eb18255590a9ff9eb97e9e1da868d4ccd6402399eaf68af20a760"},
+]
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+charset-normalizer = ">=2,<4"
+idna = ">=2.5,<4"
+urllib3 = ">=1.21.1,<3"
+
+[package.extras]
+socks = ["PySocks (>=1.5.6,!=1.5.7)"]
+use-chardet-on-py3 = ["chardet (>=3.0.2,<6)"]
+
+[[package]]
+name = "soupsieve"
+version = "2.5"
+description = "A modern CSS selector implementation for Beautiful Soup."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "soupsieve-2.5-py3-none-any.whl", hash = "sha256:eaa337ff55a1579b6549dc679565eac1e3d000563bcb1c8ab0d0fefbc0c2cdc7"},
+    {file = "soupsieve-2.5.tar.gz", hash = "sha256:5663d5a7b3bfaeee0bc4372e7fc48f9cff4940b3eec54a6451cc5299f1097690"},
+]
+
 [[package]]
 name = "sqlalchemy"
 version = "2.0.12"
 description = "Database Abstraction Library"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -499,7 +674,6 @@ sqlcipher = ["sqlcipher3-binary"]
 name = "tomli"
 version = "2.0.1"
 description = "A lil' TOML parser"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -511,7 +685,6 @@ files = [
 name = "typing-extensions"
 version = "4.5.0"
 description = "Backported and Experimental Type Hints for Python 3.7+"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -519,11 +692,27 @@ files = [
    {file = "typing_extensions-4.5.0.tar.gz", hash = "sha256:5cb5f4a79139d699607b3ef622a1dedafa84e115ab0024e0d9c044a9479ca7cb"},
 ]

+[[package]]
+name = "urllib3"
+version = "2.2.2"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "urllib3-2.2.2-py3-none-any.whl", hash = "sha256:a448b2f64d686155468037e1ace9f2d2199776e17f0a46610480d311f73e3472"},
+    {file = "urllib3-2.2.2.tar.gz", hash = "sha256:dd505485549a7a552833da5e6063639d0d177c04f23bc3864e41e5dc5f612168"},
+]
+
+[package.extras]
+brotli = ["brotli (>=1.0.9)", "brotlicffi (>=0.8.0)"]
+h2 = ["h2 (>=4,<5)"]
+socks = ["pysocks (>=1.5.6,!=1.5.7,<2.0)"]
+zstd = ["zstandard (>=0.18.0)"]
+
 [[package]]
 name = "werkzeug"
 version = "2.3.3"
 description = "The comprehensive WSGI web application library."
-category = "main"
 optional = false
 python-versions = ">=3.8"
 files = [
@ -541,7 +730,6 @@ watchdog = ["watchdog (>=2.3)"]
 name = "wtforms"
 version = "3.0.1"
 description = "Form validation and rendering for Python web development."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@ -558,4 +746,4 @@ email = ["email-validator"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "123df985006374b7c4ede4587a2facef89306039e35af84ddc9c516eecd46c89"
+content-hash = "4498f324fc36a557e7b63b693fea8a11388b127e86dcc17ab67e087dce3a9ec3"
--- a/pyproject.toml
+++ b/pyproject.toml
@ -16,6 +16,8 @@ isbnlib = "^3.10.14"
 python = "^3.11"
 sqlalchemy = "^2.0.8"
 psycopg2-binary = "^2.9.6"
+requests = "^2.32.3"
+bs4 = "^0.0.2"

 [tool.poetry.group.dev.dependencies]
 werkzeug = "^2.3.3"
--- a/worblehat/cli/main.py
+++ b/worblehat/cli/main.py
@ -1,8 +1,8 @@
 from textwrap import dedent

 from sqlalchemy import (
-   event,
-   select,
+    event,
+    select,
 )
 from sqlalchemy.orm import Session

@ -61,26 +61,6 @@ class WorblehatCli(NumberedCmd):
                    exit(0)


-    def do_list_bookcases(self, _: str):
-        bookcase_shelfs = self.sql_session.scalars(
-            select(BookcaseShelf)
-            .join(Bookcase)
-            .order_by(
-              Bookcase.name,
-              BookcaseShelf.column,
-              BookcaseShelf.row,
-            )
-        ).all()
-
-        bookcase_uid = None
-        for shelf in bookcase_shelfs:
-            if shelf.bookcase.uid != bookcase_uid:
-                print(shelf.bookcase.short_str())
-                bookcase_uid = shelf.bookcase.uid
-
-            print(f'  {shelf.short_str()} - {sum(i.amount for i in shelf.items)} items')
-
-
    def do_show_bookcase(self, arg: str):
        bookcase_selector = InteractiveItemSelector(
            cls = Bookcase,
@ -95,6 +75,35 @@ class WorblehatCli(NumberedCmd):
                print(f'  {item.name} - {item.amount} copies')


+    def do_show_borrowed_queued(self, _: str):
+        borrowed_items = self.sql_session.scalars(
+            select(BookcaseItemBorrowing)
+            .where(BookcaseItemBorrowing.delivered.is_(None))
+            .order_by(BookcaseItemBorrowing.end_time),
+        ).all()
+
+        if len(borrowed_items) == 0:
+            print('No borrowed items found.')
+        else:
+          print('Borrowed items:')
+          for item in borrowed_items:
+              print(f'- {item.username} - {item.item.name} - to be delivered by {item.end_time.strftime("%Y-%m-%d")}')
+
+        print()
+
+        queued_items = self.sql_session.scalars(
+            select(BookcaseItemBorrowingQueue)
+            .order_by(BookcaseItemBorrowingQueue.entered_queue_time),
+        ).all()
+
+        if len(queued_items) == 0:
+            print('No queued items found.')
+        else:
+          print('Users in queue:')
+          for item in queued_items:
+              print(f'- {item.username} - {item.item.name} - entered queue at {item.entered_queue_time.strftime("%Y-%m-%d")}')
+
+
    def _create_bookcase_item(self, isbn: str):
        bookcase_item = create_bookcase_item_from_isbn(isbn, self.sql_session)
        if bookcase_item is None:
@ -149,6 +158,8 @@ class WorblehatCli(NumberedCmd):
        if (existing_item := self.sql_session.scalars(
            select(BookcaseItem)
            .where(BookcaseItem.isbn == isbn)
+            .join(BookcaseItemBorrowing)
+            .join(BookcaseItemBorrowingQueue)
        ).one_or_none()) is not None:
            print(f'\nFound existing item for isbn "{isbn}"')
            BookcaseItemCli(
@ -171,6 +182,28 @@ class WorblehatCli(NumberedCmd):
            ).cmdloop()


+    def do_show_slabbedasker(self, _: str):
+        slubberter = self.sql_session.scalars(
+            select(BookcaseItemBorrowing)
+            .join(BookcaseItem)
+            .where(
+                BookcaseItemBorrowing.end_time < datetime.now(),
+                BookcaseItemBorrowing.delivered.is_(None),
+            )
+            .order_by(
+                BookcaseItemBorrowing.end_time,
+            ),
+        ).all()
+
+        if len(slubberter) == 0:
+            print('No slubberts found. Life is good.')
+            return
+
+        for slubbert in slubberter:
+            print('Slubberter:')
+            print(f'- {slubbert.username} - {slubbert.item.name} - {slubbert.end_time.strftime("%Y-%m-%d")}')
+
+
    def do_advanced(self, _: str):
        AdvancedOptionsCli(self.sql_session).cmdloop()

@ -191,10 +224,10 @@ class WorblehatCli(NumberedCmd):

    def do_exit(self, _: str):
        if self.sql_session_dirty:
-           if prompt_yes_no('Would you like to save your changes?'):
-               self.sql_session.commit()
-           else:
-               self.sql_session.rollback()
+            if prompt_yes_no('Would you like to save your changes?'):
+                self.sql_session.commit()
+            else:
+                self.sql_session.rollback()
        exit(0)


@ -204,26 +237,30 @@ class WorblehatCli(NumberedCmd):
            'doc': 'Choose / Add item with its ISBN',
        },
        1: {
-            'f': do_list_bookcases,
-            'doc': 'List all bookcases',
-        },
-        2: {
            'f': do_search,
            'doc': 'Search',
        },
-        3: {
+        2: {
            'f': do_show_bookcase,
            'doc': 'Show a bookcase, and its items',
        },
+        3: {
+            'f': do_show_borrowed_queued,
+            'doc': 'Show borrowed/queued items',
+        },
        4: {
+            'f': do_show_slabbedasker,
+            'doc': 'Show slabbedasker',
+        },
+        5: {
            'f': do_save,
            'doc': 'Save changes',
        },
-        5: {
+        6: {
            'f': do_abort,
            'doc': 'Abort changes',
        },
-        6: {
+        7: {
            'f': do_advanced,
            'doc': 'Advanced options',
        },
--- a/worblehat/cli/prompt_utils.py
+++ b/worblehat/cli/prompt_utils.py
@ -58,6 +58,7 @@ class InteractiveItemSelector(Cmd):
        self.execute_selection = execute_selection
        self.complete_selection = complete_selection
        self.default_item = default
+        self.result = None

        if default is not None:
          self.prompt = f'Select {cls.__name__} [{default.name}]> '
@ -197,6 +198,7 @@ class NumberedItemSelector(NumberedCmd):
        super().__init__()
        self.items = items
        self.stringify = stringify
+        self.result = None
        self.funcs = {
            i: {
                'f': self._select_item,
--- a/worblehat/cli/subclis/advanced_options.py
+++ b/worblehat/cli/subclis/advanced_options.py
@ -91,6 +91,26 @@ class AdvancedOptionsCli(NumberedCmd):
        self.sql_session.flush()


+    def do_list_bookcases(self, _: str):
+        bookcase_shelfs = self.sql_session.scalars(
+            select(BookcaseShelf)
+            .join(Bookcase)
+            .order_by(
+              Bookcase.name,
+              BookcaseShelf.column,
+              BookcaseShelf.row,
+            )
+        ).all()
+
+        bookcase_uid = None
+        for shelf in bookcase_shelfs:
+            if shelf.bookcase.uid != bookcase_uid:
+                print(shelf.bookcase.short_str())
+                bookcase_uid = shelf.bookcase.uid
+
+            print(f'  {shelf.short_str()} - {sum(i.amount for i in shelf.items)} items')
+
+
    def do_done(self, _: str):
        return True

@ -104,6 +124,10 @@ class AdvancedOptionsCli(NumberedCmd):
            'f': do_add_bookcase_shelf,
            'doc': 'Add bookcase shelf',
        },
+        3: {
+            'f': do_list_bookcases,
+            'doc': 'List all bookcases',
+        },
        9: {
            'f': do_done,
            'doc': 'Done',
--- a/worblehat/cli/subclis/bookcase_item.py
+++ b/worblehat/cli/subclis/bookcase_item.py
@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timedelta
 from textwrap import dedent
 from sqlalchemy import select

@ -7,6 +7,7 @@ from sqlalchemy.orm import Session
 from worblehat.cli.prompt_utils import (
    InteractiveItemSelector,
    NumberedCmd,
+    NumberedItemSelector,
    format_date,
    prompt_yes_no,
 )
@ -22,6 +23,7 @@ from worblehat.services.bookcase_item import (
    create_bookcase_item_from_isbn,
    is_valid_isbn,
 )
+from worblehat.services.config import Config

 from .bookcase_shelf_selector import select_bookcase_shelf

@ -174,6 +176,50 @@ class BookcaseItemCli(NumberedCmd):
        print(f'Successfully delivered the item for {borrowing.username}')


+    def do_extend_borrowing(self, _: str):
+        borrowings = self.sql_session.scalars(
+            select(BookcaseItemBorrowing)
+            .join(BookcaseItem, BookcaseItem.uid == BookcaseItemBorrowing.fk_bookcase_item_uid)
+            .where(BookcaseItem.isbn == self.bookcase_item.isbn)
+            .order_by(BookcaseItemBorrowing.username)
+        ).all()
+
+        if len(borrowings) == 0:
+            print('No one seems to have borrowed this item')
+            return
+
+        borrowing_queue = self.sql_session.scalars(
+            select(BookcaseItemBorrowingQueue)
+            .where(
+                BookcaseItemBorrowingQueue.item == self.bookcase_item,
+                BookcaseItemBorrowingQueue.item_became_available_time == None,
+            )
+            .order_by(BookcaseItemBorrowingQueue.entered_queue_time)
+        ).all()
+
+        if len(borrowing_queue) != 0:
+          print('Sorry, you cannot extend the borrowing because there are people waiting in the queue')
+          print('Borrowing queue:')
+          for i, b in enumerate(borrowing_queue):
+              print(f'  {i + 1}) {b.username}')
+          return
+
+        print('Who are you?')
+        selector = NumberedItemSelector(
+            items = list(borrowings),
+            stringify = lambda b: f'{b.username} - Until {format_date(b.end_time)}',
+        )
+        selector.cmdloop()
+        if selector.result is None:
+            return
+        borrowing = selector.result
+
+        borrowing.end_time = datetime.now() + timedelta(days=int(Config['deadline_daemon.days_before_queue_position_expires']))
+        self.sql_session.flush()
+
+        print(f'Successfully extended the borrowing for {borrowing.username} until {format_date(borrowing.end_time)}')
+
+
    def do_done(self, _: str):
        return True

@ -188,10 +234,14 @@ class BookcaseItemCli(NumberedCmd):
            'doc': 'Deliver',
        },
        3: {
+            'f': do_extend_borrowing,
+            'doc': 'Extend borrowing',
+        },
+        4: {
            'f': do_edit,
            'doc': 'Edit',
        },
-        4: {
+        5: {
            'f': do_update_data,
            'doc': 'Pull updated data from online databases',
        },
--- a/worblehat/cli/subclis/search.py
+++ b/worblehat/cli/subclis/search.py
@ -13,6 +13,7 @@ class SearchCli(NumberedCmd):
    def __init__(self, sql_session: Session):
        super().__init__()
        self.sql_session = sql_session
+        self.result = None


    def do_search_all(self, _: str):
@ -57,11 +58,11 @@ class SearchCli(NumberedCmd):
        elif len(author) == 1:
            selected_author = author[0]
            print('Found author:')
-            print(f"  {selected_author.name} ({sum(item.amount for item in selected_author.books)} items)")
+            print(f"  {selected_author.name} ({sum(item.amount for item in selected_author.items)} items)")
        else:
            selector = NumberedItemSelector(
                items = author,
-                stringify = lambda author: f"{author.name} ({sum(item.amount for item in author.books)} items)",
+                stringify = lambda author: f"{author.name} ({sum(item.amount for item in author.items)} items)",
            )
            selector.cmdloop()
            if selector.result is None:
@ -69,7 +70,7 @@ class SearchCli(NumberedCmd):
            selected_author = selector.result

        selector = NumberedItemSelector(
-            items = selected_author.books,
+            items = list(selected_author.items),
            stringify = lambda item: f"{item.name} ({item.isbn})",
        )
        selector.cmdloop()
--- a/worblehat/deadline_daemon/main.py
+++ b/worblehat/deadline_daemon/main.py
@ -11,14 +11,25 @@ from worblehat.models import (
    DeadlineDaemonLastRunDatetime,
    BookcaseItemBorrowingQueue,
 )
+
 from worblehat.services.email import send_email

 class DeadlineDaemon:
    def __init__(self, sql_session: Session):
+        if not Config['deadline_daemon.enabled']:
+            return
+
        self.sql_session = sql_session
+
        self.last_run = self.sql_session.scalars(
            select(DeadlineDaemonLastRunDatetime),
-        ).one()
+        ).one_or_none()
+
+        if self.last_run is None:
+            logging.info('No previous run found, assuming this is the first run')
+            self.last_run = DeadlineDaemonLastRunDatetime(time=datetime.now())
+            self.sql_session.add(self.last_run)
+            self.sql_session.commit()

        self.last_run_datetime = self.last_run.time
        self.current_run_datetime = datetime.now()
@ -26,6 +37,12 @@ class DeadlineDaemon:

    def run(self):
        logging.info('Deadline daemon started')
+        if not Config['deadline_daemon.enabled']:
+            logging.warn('Deadline daemon disabled, exiting')
+            return
+
+        if Config['deadline_daemon.dryrun']:
+            logging.warn('Running in dryrun mode')

        self.send_close_deadline_reminder_mails()
        self.send_overdue_mails()
@ -36,6 +53,97 @@ class DeadlineDaemon:
        self.last_run.time = self.current_run_datetime
        self.sql_session.commit()

+    ###################
+    # EMAIL TEMPLATES #
+    ###################
+
+    def _send_close_deadline_mail(self, borrowing: BookcaseItemBorrowing):
+        logging.info(f'Sending close deadline mail to {borrowing.username}@pvv.ntnu.no.')
+        send_email(
+            f'{borrowing.username}@pvv.ntnu.no',
+            'Reminder - Your borrowing deadline is approaching',
+            dedent(f'''
+                Your borrowing deadline for the following item is approaching:
+                
+                {borrowing.item.name}
+                
+                Please return the item by {borrowing.end_time.strftime("%a %b %d, %Y")}
+                ''',
+            ).strip(),
+        )
+
+
+    def _send_overdue_mail(self, borrowing: BookcaseItemBorrowing):
+        logging.info(f'Sending overdue mail to {borrowing.username}@pvv.ntnu.no for {borrowing.item.isbn} - {borrowing.end_time.strftime("%a %b %d, %Y")}')
+        send_email(
+            f'{borrowing.username}@pvv.ntnu.no',
+            'Your deadline has passed',
+            dedent(f'''
+                Your delivery deadline for the following item has passed:
+                
+                {borrowing.item.name}
+                
+                Please return the item as soon as possible.
+                ''',
+            ).strip(),
+        )
+
+
+    def _send_newly_available_mail(self, queue_item: BookcaseItemBorrowingQueue):
+        logging.info(f'Sending newly available mail to {queue_item.username}')
+
+        days_before_queue_expires = Config['deadline_daemon.days_before_queue_position_expires']
+
+        # TODO: calculate and format the date of when the queue position expires in the mail.
+        send_email(
+            f'{queue_item.username}@pvv.ntnu.no',
+            'An item you have queued for is now available',
+            dedent(f'''
+                The following item is now available for you to borrow:
+
+                {queue_item.item.name}
+
+                Please pick up the item within {days_before_queue_expires} days.
+                ''',
+            ).strip(),
+        )
+
+
+    def _send_expiring_queue_position_mail(self, queue_position: BookcaseItemBorrowingQueue, day: int):
+        logging.info(f'Sending queue position expiry reminder to {queue_position.username}@pvv.ntnu.no.')
+        send_email(
+            f'{queue_position.username}@pvv.ntnu.no',
+            'Reminder - Your queue position expiry deadline is approaching',
+            dedent(f'''
+                Your queue position expiry deadline for the following item is approaching:
+                
+                {queue_position.item.name}
+                
+                Please borrow the item by {(queue_position.item_became_available_time + timedelta(days=day)).strftime("%a %b %d, %Y")}
+                ''',
+            ).strip(),
+        )
+    
+    
+    def _send_queue_position_expired_mail(self, queue_position: BookcaseItemBorrowingQueue):
+        send_email(
+            f'{queue_position.username}@pvv.ntnu.no',
+            'Your queue position has expired',
+            dedent(f'''
+                Your queue position for the following item has expired:
+                
+                {queue_position.item.name}
+                
+                You can queue for the item again at any time, but you will be placed at the back of the queue.
+
+                There are currently {len(queue_position.item.borrowing_queue)} users in the queue.
+                ''',
+            ).strip(),
+        )
+
+    ##################
+    # EMAIL ROUTINES #
+    ##################

    def _sql_subtract_date(self, x: datetime, y: timedelta):
        if self.sql_session.bind.dialect.name == 'sqlite':
@ -48,10 +156,10 @@ class DeadlineDaemon:


    def send_close_deadline_reminder_mails(self):
-        logging.info('Sending mails about items with a closing deadline')
+        logging.info('Sending mails for items with a closing deadline')

        # TODO: This should be int-parsed and validated before the daemon started
-        days = [int(d) for d in Config['deadline_daemon.warn_days_before_borrow_deadline']]
+        days = [int(d) for d in Config['deadline_daemon.warn_days_before_borrowing_deadline']]

        for day in days:
            borrowings_to_remind = self.sql_session.scalars(
@ -69,23 +177,11 @@ class DeadlineDaemon:
                ),
            ).all()
            for borrowing in borrowings_to_remind:
-                logging.info(f'  Sending close deadline mail to {borrowing.username}@pvv.ntnu.no. {day} days left')
-                send_email(
-                    f'{borrowing.username}@pvv.ntnu.no',
-                    'Reminder - Your borrowing deadline is approaching',
-                    dedent(f'''
-                        Your borrowing deadline for the following item is approaching:
-                        
-                        {borrowing.item.name}
-                        
-                        Please return the item by {borrowing.end_time.strftime("%a %b %d, %Y")}
-                        ''',
-                    ).strip(),
-                )
+                self._send_close_deadline_mail(borrowing)


    def send_overdue_mails(self):
-        logging.info('Sending mails about overdue items')
+        logging.info('Sending mails for overdue items')

        to_remind = self.sql_session.scalars(
            select(BookcaseItemBorrowing)
@ -96,19 +192,7 @@ class DeadlineDaemon:
        ).all()

        for borrowing in to_remind:
-            logging.info(f'  Sending overdue mail to {borrowing.username}@pvv.ntnu.no for {borrowing.item.isbn} - {borrowing.end_time.strftime("%a %b %d, %Y")}')
-            send_email(
-                f'{borrowing.username}@pvv.ntnu.no',
-                'Your deadline has passed',
-                dedent(f'''
-                    Your delivery deadline for the following item has passed:
-                    
-                    {borrowing.item.name}
-                    
-                    Please return the item as soon as possible.
-                    ''',
-                ).strip(),
-            )
+            self._send_overdue_mail(borrowing)


    def send_newly_available_mails(self):
@ -133,15 +217,75 @@ class DeadlineDaemon:
        ).all()

        for queue_item in newly_available:
-            logging.info(f'Sending newly available mail to {queue_item.username}')
-            logging.warning('Not implemented')
+            logging.info(f'Adding user {queue_item.username} to queue for {queue_item.item.name}')
+            queue_item.item_became_available_time = self.current_run_datetime
+            self.sql_session.commit()
+
+            self._send_newly_available_mail(queue_item)


    def send_expiring_queue_position_mails(self):
        logging.info('Sending mails about queue positions which are expiring soon')
        logging.warning('Not implemented')

+        days = [int(d) for d in Config['deadline_daemon.warn_days_before_expiring_queue_position_deadline']]
+        for day in days:
+            queue_positions_to_remind = self.sql_session.scalars(
+                select(BookcaseItemBorrowingQueue)
+                .join(
+                    BookcaseItemBorrowing,
+                    BookcaseItemBorrowing.fk_bookcase_item_uid == BookcaseItemBorrowingQueue.fk_bookcase_item_uid,
+                )
+                .where(
+                    self._sql_subtract_date(
+                        BookcaseItemBorrowingQueue.item_became_available_time + timedelta(days=day),
+                        timedelta(days=day),
+                    )
+                    .between(
+                        self.last_run_datetime,
+                        self.current_run_datetime,
+                    ),
+                ),
+            ).all()
+
+            for queue_position in queue_positions_to_remind:
+                self._send_expiring_queue_position_mail(queue_position, day)
+

    def auto_expire_queue_positions(self):
        logging.info('Expiring queue positions which are too old')
-        logging.warning('Not implemented')
+
+        queue_position_expiry_days = int(Config['deadline_daemon.days_before_queue_position_expires'])
+
+        overdue_queue_positions = self.sql_session.scalars(
+            select(BookcaseItemBorrowingQueue)
+            .where(
+                BookcaseItemBorrowingQueue.item_became_available_time + timedelta(days=queue_position_expiry_days) < self.current_run_datetime,
+                BookcaseItemBorrowingQueue.expired.is_(False),
+            ),
+        ).all()
+
+        for queue_position in overdue_queue_positions:
+            logging.info(f'Expiring queue position for {queue_position.username} for item {queue_position.item.name}')
+
+            queue_position.expired = True
+
+            next_queue_position = self.sql_session.scalars(
+                select(BookcaseItemBorrowingQueue)
+                .where(
+                    BookcaseItemBorrowingQueue.fk_bookcase_item_uid == queue_position.fk_bookcase_item_uid,
+                    BookcaseItemBorrowingQueue.item_became_available_time.is_(None),
+                )
+                .order_by(BookcaseItemBorrowingQueue.entered_queue_time)
+                .limit(1),
+            ).one_or_none()
+
+            self._send_queue_position_expired_mail(queue_position)
+
+            if next_queue_position is not None:
+                next_queue_position.item_became_available_time = self.current_run_datetime
+
+                logging.info(f'Next user in queue for item {next_queue_position.item.name} is {next_queue_position.username}')
+                self._send_newly_available_mail(next_queue_position)
+
+            self.sql_session.commit()
--- a/worblehat/devscripts/seed_content_for_deadline_daemon.py
+++ b/worblehat/devscripts/seed_content_for_deadline_daemon.py
@ -0,0 +1,117 @@
+from datetime import datetime, timedelta
+
+from worblehat.models import (
+  BookcaseItem,
+  BookcaseItemBorrowing,
+  BookcaseItemBorrowingQueue,
+  DeadlineDaemonLastRunDatetime,
+)
+
+from worblehat.services.config import Config
+
+from .seed_test_data import main as seed_test_data_main
+
+
+def clear_db(sql_session):
+  sql_session.query(BookcaseItemBorrowingQueue).delete()
+  sql_session.query(BookcaseItemBorrowing).delete()
+  sql_session.query(DeadlineDaemonLastRunDatetime).delete()
+  sql_session.commit()
+
+# NOTE: feel free to change this function to suit your needs
+#       it's just a quick and dirty way to get some data into the database
+#       for testing the deadline daemon - oysteikt 2024
+def main(sql_session):
+  borrow_warning_days = [timedelta(days=int(d)) for d in Config['deadline_daemon.warn_days_before_borrowing_deadline']]
+  queue_warning_days = [timedelta(days=int(d)) for d in Config['deadline_daemon.warn_days_before_expiring_queue_position_deadline']]
+  queue_expire_days = int(Config['deadline_daemon.days_before_queue_position_expires'])
+
+  clear_db(sql_session)
+  seed_test_data_main(sql_session)
+
+  books = sql_session.query(BookcaseItem).all()
+
+  last_run_datetime = datetime.now() - timedelta(days=16)
+  last_run = DeadlineDaemonLastRunDatetime(last_run_datetime)
+  sql_session.add(last_run)
+
+  # Create at least one item that is borrowed and not supposed to be returned yet
+  borrowing = BookcaseItemBorrowing(
+    item=books[0],
+    username='test_borrower_still_borrowing',
+  )
+  borrowing.start_time = last_run_datetime - timedelta(days=1)
+  borrowing.end_time = datetime.now() - timedelta(days=6)
+  sql_session.add(borrowing)
+
+  # Create at least one item that is borrowed and is supposed to be returned soon
+  borrowing = BookcaseItemBorrowing(
+    item=books[1],
+    username='test_borrower_return_soon',
+  )
+  borrowing.start_time = last_run_datetime - timedelta(days=1)
+  borrowing.end_time = datetime.now() - timedelta(days=2)
+  sql_session.add(borrowing)
+
+  # Create at least one item that is borrowed and is overdue
+  borrowing = BookcaseItemBorrowing(
+    item=books[2],
+    username='test_borrower_overdue',
+  )
+  borrowing.start_time = datetime.now() - timedelta(days=1)
+  borrowing.end_time = datetime.now() + timedelta(days=1)
+  sql_session.add(borrowing)
+
+  # Create at least one item that is in the queue and is not supposed to be borrowed yet
+  queue_item = BookcaseItemBorrowingQueue(
+    item=books[3],
+    username='test_queue_user_still_waiting',
+  )
+  queue_item.entered_queue_time = last_run_datetime - timedelta(days=1)
+  borrowing = BookcaseItemBorrowing(
+    item=books[3],
+    username='test_borrower_return_soon',
+  )
+  borrowing.start_time = last_run_datetime - timedelta(days=1)
+  borrowing.end_time = datetime.now() - timedelta(days=2)
+  sql_session.add(queue_item)
+  sql_session.add(borrowing)
+
+  # Create at least three items that is in the queue and two items were just returned
+  for i in range(3):
+    queue_item = BookcaseItemBorrowingQueue(
+      item=books[4 + i],
+      username=f'test_queue_user_{i}',
+    )
+    sql_session.add(queue_item)
+
+  for i in range(3):
+    borrowing = BookcaseItemBorrowing(
+      item=books[4 + i],
+      username=f'test_borrower_returned_{i}',
+    )
+    borrowing.start_time = last_run_datetime - timedelta(days=2)
+    borrowing.end_time = datetime.now() + timedelta(days=1)
+
+    if i != 2:
+      borrowing.delivered = datetime.now() - timedelta(days=1)
+
+    sql_session.add(borrowing)
+
+  # Create at least one item that has been in the queue for so long that the queue position should expire
+  queue_item = BookcaseItemBorrowingQueue(
+    item=books[7],
+    username='test_queue_user_expired',
+  )
+  queue_item.entered_queue_time = datetime.now() - timedelta(days=15)
+
+  # Create at least one item that has been in the queue for so long that the queue position should expire,
+  # but the queue person has already been notified
+  queue_item = BookcaseItemBorrowingQueue(
+    item=books[8],
+    username='test_queue_user_expired_notified',
+  )
+  queue_item.entered_queue_time = datetime.now() - timedelta(days=15)
+
+  sql_session.commit()
+
--- a/worblehat/devscripts/seed_test_data.py
+++ b/worblehat/devscripts/seed_test_data.py
@ -0,0 +1,87 @@
+import csv
+
+from pathlib import Path
+from datetime import datetime, timedelta
+
+from worblehat.models import (
+  Bookcase,
+  BookcaseItem,
+  BookcaseShelf,
+  MediaType,
+  Language,
+)
+from worblehat.services.config import Config
+
+
+CSV_FILE = Path(__file__).parent.parent.parent / 'data' / 'arbeidsrom_smal_hylle_5.csv'
+
+def clear_db(sql_session):
+    sql_session.query(BookcaseItem).delete()
+    sql_session.query(BookcaseShelf).delete()
+    sql_session.query(Bookcase).delete()
+    sql_session.query(MediaType).delete()
+    sql_session.query(Language).delete()
+    sql_session.commit()
+
+def main(sql_session):
+    clear_db(sql_session)
+
+    media_type = MediaType(
+        name='Book',
+        description='A book',
+    )
+    sql_session.add(media_type)
+
+    language = Language(
+        name='Norwegian',
+        iso639_1_code='no',
+    )
+    sql_session.add(language)
+
+    seed_case = Bookcase(
+        name='seed_case',
+        description='test bookcase with test data',
+    )
+    sql_session.add(seed_case)
+
+    seed_shelf_1 = BookcaseShelf(
+      row=1,
+      column=1,
+      bookcase=seed_case,
+      description='test shelf with test data 1',
+    )
+    seed_shelf_2 = BookcaseShelf(
+      row=2,
+      column=1,
+      bookcase=seed_case,
+      description='test shelf with test data 2',
+    )
+    sql_session.add(seed_shelf_1)
+    sql_session.add(seed_shelf_2)
+
+    bookcase_items = []
+    with open(CSV_FILE) as csv_file:
+        csv_reader = csv.reader(csv_file, delimiter=',')
+
+        next(csv_reader)
+        for row in csv_reader:
+            item = BookcaseItem(
+                isbn=row[0],
+                name=row[1],
+            )
+            item.media_type = media_type
+            item.language = language
+            bookcase_items.append(item)
+
+    half = len(bookcase_items) // 2
+    first_half = bookcase_items[:half]
+    second_half = bookcase_items[half:]
+
+    for item in first_half:
+        seed_shelf_1.items.add(item)
+
+    for item in second_half:
+        seed_shelf_2.items.add(item)
+
+    sql_session.add_all(bookcase_items)
+    sql_session.commit()
--- a/worblehat/main.py
+++ b/worblehat/main.py
@ -7,6 +7,7 @@ from sqlalchemy.orm import Session
 from .services import (
    Config,
    arg_parser,
+    devscripts_arg_parser,
 )

 from .deadline_daemon import DeadlineDaemon
@ -60,6 +61,19 @@ def main():
        WorblehatCli.run_with_safe_exit_wrapper(sql_session)
        exit(0)

+    if args.command == 'devscripts':
+        sql_session = _connect_to_database(echo=Config['logging.debug_sql'])
+        if args.script == 'seed-content-for-deadline-daemon':
+            from .devscripts.seed_content_for_deadline_daemon import main
+            main(sql_session)
+        elif args.script == 'seed-test-data':
+            from .devscripts.seed_test_data import main
+            main(sql_session)
+        else:
+            print(devscripts_arg_parser.format_help())
+            exit(1)
+        exit(0)
+
    if args.command == 'flask-dev':
        flask_dev_main()
        exit(0)
@ -70,4 +84,5 @@ def main():
        flask_prod_main()
        exit(0)

-    print(arg_parser.format_help())
+    print(arg_parser.format_help())
+    exit(1)
--- a/worblehat/models/BookcaseItem.py
+++ b/worblehat/models/BookcaseItem.py
@ -2,10 +2,11 @@ from __future__ import annotations
 from typing import TYPE_CHECKING

 from sqlalchemy import (
+  ForeignKey,
  Integer,
  SmallInteger,
  String,
-  ForeignKey,
+  Text,
 )
 from sqlalchemy.orm import (
    Mapped,
@ -31,13 +32,16 @@ if TYPE_CHECKING:
    from .Language import Language
    from .MediaType import MediaType

-class BookcaseItem(Base, UidMixin, UniqueNameMixin):
+from worblehat.flaskapp.database import db
+
+class BookcaseItem(Base, UidMixin):
    isbn: Mapped[int] = mapped_column(String, unique=True, index=True)
+    name: Mapped[str] = mapped_column(Text, index=True)
    owner: Mapped[str] = mapped_column(String, default='PVV')
    amount: Mapped[int] = mapped_column(SmallInteger, default=1)

    fk_media_type_uid: Mapped[int] = mapped_column(ForeignKey('MediaType.uid'))
-    fk_bookcase_shelf_uid: Mapped[int | None] = mapped_column(ForeignKey('BookcaseShelf.uid'))
+    fk_bookcase_shelf_uid: Mapped[int] = mapped_column(ForeignKey('BookcaseShelf.uid'))
    fk_language_uid: Mapped[int | None] = mapped_column(ForeignKey('Language.uid'))

    media_type: Mapped[MediaType] = relationship(back_populates='items')
@ -63,4 +67,13 @@ class BookcaseItem(Base, UidMixin, UniqueNameMixin):
    ):
        self.name = name
        self.isbn = isbn
-        self.owner = owner
+        self.owner = owner
+
+    @classmethod
+    def get_by_isbn(cls, isbn: str, sql_session: Session = db.session) -> Self | None:
+        """
+        NOTE:
+        This method defaults to using the flask_sqlalchemy session.
+        It will not work outside of a request context, unless another session is provided.
+        """
+        return sql_session.query(cls).where(cls.isbn == isbn).one_or_none()
--- a/worblehat/models/BookcaseItemBorrowingQueue.py
+++ b/worblehat/models/BookcaseItemBorrowingQueue.py
@ -21,7 +21,8 @@ if TYPE_CHECKING:

 class BookcaseItemBorrowingQueue(Base, UidMixin):
    username: Mapped[str] = mapped_column(String)
-    entered_queue_time = mapped_column(DateTime, default=datetime.now())
+    entered_queue_time: Mapped[datetime] = mapped_column(DateTime, default=datetime.now())
+    item_became_available_time: Mapped[datetime | None] = mapped_column(DateTime)
    expired = mapped_column(Boolean, default=False)

    fk_bookcase_item_uid: Mapped[int] = mapped_column(ForeignKey('BookcaseItem.uid'), index=True)
--- a/worblehat/models/DeadlineDaemonLastRunDatetime.py
+++ b/worblehat/models/DeadlineDaemonLastRunDatetime.py
@ -20,4 +20,8 @@ class DeadlineDaemonLastRunDatetime(Base):
        ),
    )
    uid: Mapped[bool] = mapped_column(Boolean, primary_key=True, default=True)
-    time: Mapped[datetime] = mapped_column(DateTime, default=datetime.now())
+    time: Mapped[datetime] = mapped_column(DateTime, default=datetime.now())
+
+    def __init__(self, time: datetime | None = None):
+        if time is not None:
+            self.time = time
--- a/worblehat/models/migrations/versions/2024-07-31T2107_7dfbf8a8dec8_initial_migration.py
+++ b/worblehat/models/migrations/versions/2024-07-31T2107_7dfbf8a8dec8_initial_migration.py
@ -1,8 +1,8 @@
 """initial_migration

-Revision ID: d51c7172d2f2
+Revision ID: 7dfbf8a8dec8
 Revises: 
-Create Date: 2023-05-06 17:46:39.230122
+Create Date: 2024-07-31 21:07:13.434012

 """
 from alembic import op
@ -10,7 +10,7 @@ import sqlalchemy as sa


 # revision identifiers, used by Alembic.
-revision = 'd51c7172d2f2'
+revision = '7dfbf8a8dec8'
 down_revision = None
 branch_labels = None
 depends_on = None
@ -44,6 +44,12 @@ def upgrade() -> None:
    with op.batch_alter_table('Category', schema=None) as batch_op:
        batch_op.create_index(batch_op.f('ix_Category_name'), ['name'], unique=True)

+    op.create_table('DeadlineDaemonLastRunDatetime',
+    sa.Column('uid', sa.Boolean(), nullable=False),
+    sa.Column('time', sa.DateTime(), nullable=False),
+    sa.CheckConstraint('uid = true', name=op.f('ck_DeadlineDaemonLastRunDatetime_`single_row_only`')),
+    sa.PrimaryKeyConstraint('uid', name=op.f('pk_DeadlineDaemonLastRunDatetime'))
+    )
    op.create_table('Language',
    sa.Column('iso639_1_code', sa.String(length=2), nullable=False),
    sa.Column('uid', sa.Integer(), nullable=False),
@ -75,13 +81,13 @@ def upgrade() -> None:
    )
    op.create_table('BookcaseItem',
    sa.Column('isbn', sa.String(), nullable=False),
+    sa.Column('name', sa.Text(), nullable=False),
    sa.Column('owner', sa.String(), nullable=False),
    sa.Column('amount', sa.SmallInteger(), nullable=False),
    sa.Column('fk_media_type_uid', sa.Integer(), nullable=False),
-    sa.Column('fk_bookcase_shelf_uid', sa.Integer(), nullable=True),
+    sa.Column('fk_bookcase_shelf_uid', sa.Integer(), nullable=False),
    sa.Column('fk_language_uid', sa.Integer(), nullable=True),
    sa.Column('uid', sa.Integer(), nullable=False),
-    sa.Column('name', sa.Text(), nullable=False),
    sa.ForeignKeyConstraint(['fk_bookcase_shelf_uid'], ['BookcaseShelf.uid'], name=op.f('fk_BookcaseItem_fk_bookcase_shelf_uid_BookcaseShelf')),
    sa.ForeignKeyConstraint(['fk_language_uid'], ['Language.uid'], name=op.f('fk_BookcaseItem_fk_language_uid_Language')),
    sa.ForeignKeyConstraint(['fk_media_type_uid'], ['MediaType.uid'], name=op.f('fk_BookcaseItem_fk_media_type_uid_MediaType')),
@ -89,13 +95,13 @@ def upgrade() -> None:
    )
    with op.batch_alter_table('BookcaseItem', schema=None) as batch_op:
        batch_op.create_index(batch_op.f('ix_BookcaseItem_isbn'), ['isbn'], unique=True)
-        batch_op.create_index(batch_op.f('ix_BookcaseItem_name'), ['name'], unique=True)
+        batch_op.create_index(batch_op.f('ix_BookcaseItem_name'), ['name'], unique=False)

    op.create_table('BookcaseItemBorrowing',
    sa.Column('username', sa.String(), nullable=False),
    sa.Column('start_time', sa.DateTime(), nullable=False),
    sa.Column('end_time', sa.DateTime(), nullable=False),
-    sa.Column('delivered', sa.Boolean(), nullable=False),
+    sa.Column('delivered', sa.DateTime(), nullable=True),
    sa.Column('fk_bookcase_item_uid', sa.Integer(), nullable=False),
    sa.Column('uid', sa.Integer(), nullable=False),
    sa.ForeignKeyConstraint(['fk_bookcase_item_uid'], ['BookcaseItem.uid'], name=op.f('fk_BookcaseItemBorrowing_fk_bookcase_item_uid_BookcaseItem')),
@ -106,8 +112,9 @@ def upgrade() -> None:

    op.create_table('BookcaseItemBorrowingQueue',
    sa.Column('username', sa.String(), nullable=False),
-    sa.Column('entered_queue_time', sa.DateTime(), nullable=True),
-    sa.Column('should_notify_user', sa.Boolean(), nullable=True),
+    sa.Column('entered_queue_time', sa.DateTime(), nullable=False),
+    sa.Column('item_became_available_time', sa.DateTime(), nullable=True),
+    sa.Column('expired', sa.Boolean(), nullable=True),
    sa.Column('fk_bookcase_item_uid', sa.Integer(), nullable=False),
    sa.Column('uid', sa.Integer(), nullable=False),
    sa.ForeignKeyConstraint(['fk_bookcase_item_uid'], ['BookcaseItem.uid'], name=op.f('fk_BookcaseItemBorrowingQueue_fk_bookcase_item_uid_BookcaseItem')),
@ -160,6 +167,7 @@ def downgrade() -> None:
        batch_op.drop_index(batch_op.f('ix_Language_iso639_1_code'))

    op.drop_table('Language')
+    op.drop_table('DeadlineDaemonLastRunDatetime')
    with op.batch_alter_table('Category', schema=None) as batch_op:
        batch_op.drop_index(batch_op.f('ix_Category_name'))

--- a/worblehat/services/init.py
+++ b/worblehat/services/init.py
@ -1,4 +1,7 @@
-from .argument_parser import arg_parser
+from .argument_parser import (
+  arg_parser,
+  devscripts_arg_parser,
+)
 from .bookcase_item import (
    create_bookcase_item_from_isbn,
    is_valid_isbn,
--- a/worblehat/services/argument_parser.py
+++ b/worblehat/services/argument_parser.py
@ -31,6 +31,19 @@ subparsers.add_parser(
    help = 'Start the web interface in production mode',
 )

+devscripts_arg_parser = subparsers.add_parser('devscripts', help='Run development scripts')
+devscripts_subparsers = devscripts_arg_parser.add_subparsers(dest='script')
+
+devscripts_subparsers.add_parser(
+    'seed-test-data',
+    help = 'Seed test data in the database',
+)
+
+devscripts_subparsers.add_parser(
+    'seed-content-for-deadline-daemon',
+    help = 'Seed data tailorded for testing the deadline daemon, into the database',
+)
+
 arg_parser.add_argument(
    '-V',
    '--version',
--- a/worblehat/services/bookcase_item.py
+++ b/worblehat/services/bookcase_item.py
@ -3,6 +3,7 @@ import isbnlib
 from sqlalchemy import select
 from sqlalchemy.orm import Session

+from .metadata_fetchers import fetch_metadata_from_multiple_sources
 from ..models import (
    Author,
    BookcaseItem,
@ -25,20 +26,32 @@ def is_valid_isbn(isbn: str) -> bool:


 def create_bookcase_item_from_isbn(isbn: str, sql_session: Session) -> BookcaseItem | None:
-    metadata = isbnlib.meta(isbn, 'openl')
-    if len(metadata.keys()) == 0:
+    """
+    This function fetches metadata for the given ISBN and creates a BookcaseItem from it.
+    It does so using a database connection to connect it to the correct authors and language
+    through the sql ORM.
+
+    If no metadata is found, None is returned.
+
+    Please not that the returned BookcaseItem will likely not be fully populated with the required
+    data, such as the book's location in the library, and the owner of the book, etc.
+    """
+    metadata = fetch_metadata_from_multiple_sources(isbn)
+    if len(metadata) == 0:
        return None

+    metadata = metadata[0]
+
    bookcase_item = BookcaseItem(
-        name = metadata.get('Title'),
+        name = metadata.title,
        isbn = int(isbn.replace('-', '')),
    )

-    if len(authors := metadata.get('Authors')) > 0:
+    if len(authors := metadata.authors) > 0:
        for author in authors:
            bookcase_item.authors.add(Author(author))

-    if (language := metadata.get('Language')):
+    if (language := metadata.language):
        bookcase_item.language = sql_session.scalars(
            select(Language)
            .where(Language.iso639_1_code == language)
--- a/worblehat/services/config.py
+++ b/worblehat/services/config.py
@ -24,6 +24,9 @@ class Config:
    ]

    def __class_getitem__(cls, name: str) -> Any:
+        if cls._config is None:
+            raise RuntimeError('Configuration not loaded, call Config.load_configuration() first.')
+
        __config = cls._config
        for attr in name.split('.'):
            __config = __config.get(attr)
--- a/worblehat/services/email.py
+++ b/worblehat/services/email.py
@ -1,6 +1,7 @@
-from pathlib import Path
 import smtplib

+from textwrap import indent
+
 from email.mime.text import MIMEText
 from email.mime.multipart import MIMEMultipart

@ -8,16 +9,16 @@ from .config import Config


 def send_email(to: str, subject: str, body: str):
-    if Config['smtp.enabled']:
-        msg = MIMEMultipart()
-        msg['From'] = Config['smtp.from']
-        msg['To'] = to
-        if Config['smtp.subject_prefix']:
-            msg['Subject'] = f"{Config['smtp.subject_prefix']} {subject}"
-        else:
-            msg['Subject'] = subject
-        msg.attach(MIMEText(body, 'plain'))
+    msg = MIMEMultipart()
+    msg['From'] = Config['smtp.from']
+    msg['To'] = to
+    if Config['smtp.subject_prefix']:
+        msg['Subject'] = f"{Config['smtp.subject_prefix']} {subject}"
+    else:
+        msg['Subject'] = subject
+    msg.attach(MIMEText(body, 'plain'))

+    if Config['smtp.enabled'] and not Config['deadline_daemon.dryrun']:
        try:
            with smtplib.SMTP(Config['smtp.host'], Config['smtp.port']) as server:
                server.starttls()
@ -31,6 +32,4 @@ def send_email(to: str, subject: str, body: str):
            print(err)
    else:
        print('Debug: Email sending is disabled, so the following email was not sent:')
-        print(f'  To: {to}')
-        print(f'  Subject: {subject}')
-        print(f'  Body: {body}')
+        print(indent(msg.as_string(), '  '))
--- a/worblehat/services/metadata_fetchers/BookMetadata.py
+++ b/worblehat/services/metadata_fetchers/BookMetadata.py
@ -0,0 +1,62 @@
+from dataclasses import dataclass
+from typing import Set
+
+
+# TODO: Add more languages
+LANGUAGES: set[str] = set([
+    "no",
+    "en",
+    "de",
+    "fr",
+    "es",
+    "it",
+    "sv",
+    "da",
+    "fi",
+    "ru",
+    "zh",
+    "ja",
+    "ko",
+])
+
+
+@dataclass
+class BookMetadata:
+    """A class representing metadata for a book."""
+    isbn: str
+    title: str
+    # The source of the metadata provider
+    source: str
+    authors: Set[str]
+    language: str | None
+    publish_date: str | None
+    num_pages: int | None
+    subjects: Set[str]
+
+    def to_dict(self) -> dict[str, any]:
+        return {
+            'isbn': self.isbn,
+            'title': self.title,
+            'source': self.metadata_source_id(),
+            'authors': set() if self.authors is None else self.authors,
+            'language': self.language,
+            'publish_date': self.publish_date,
+            'num_pages': self.num_pages,
+            'subjects': set() if self.subjects is None else self.subjects
+        }
+
+    def validate(self) -> None:
+        if not self.isbn:
+            raise ValueError('Missing ISBN')
+        if not self.title:
+            raise ValueError('Missing title')
+        if not self.source:
+            raise ValueError('Missing source')
+        if not self.authors:
+            raise ValueError('Missing authors')
+
+        if self.language is not None and self.language not in LANGUAGES:
+            raise ValueError(f'Invalid language: {self.language}. Consider adding it to the LANGUAGES set if you think this is a mistake.')
+
+        if self.num_pages is not None and self.num_pages < 0:
+            raise ValueError(f'Invalid number of pages: {self.num_pages}')
--- a/worblehat/services/metadata_fetchers/BookMetadataFetcher.py
+++ b/worblehat/services/metadata_fetchers/BookMetadataFetcher.py
@ -0,0 +1,20 @@
+#base fetcher.
+from abc import ABC, abstractmethod
+from .BookMetadata import BookMetadata
+
+class BookMetadataFetcher(ABC):
+    """
+    A base class for metadata fetchers.
+    """
+
+    @classmethod
+    @abstractmethod
+    def metadata_source_id(cls) -> str:
+        """Returns a unique identifier for the metadata source, to identify where the metadata came from."""
+        pass
+
+    @classmethod
+    @abstractmethod
+    def fetch_metadata(cls, isbn: str) -> BookMetadata | None:
+        """Tries to fetch metadata for the given ISBN."""
+        pass
--- a/worblehat/services/metadata_fetchers/GoogleBooksFetcher.py
+++ b/worblehat/services/metadata_fetchers/GoogleBooksFetcher.py
@ -0,0 +1,51 @@
+"""
+A BookMetadataFetcher for the Google Books API.
+"""
+
+import requests
+
+from worblehat.services.metadata_fetchers.BookMetadataFetcher import BookMetadataFetcher
+from worblehat.services.metadata_fetchers.BookMetadata import BookMetadata
+
+
+class GoogleBooksFetcher(BookMetadataFetcher):
+    @classmethod
+    def metadata_source_id(_cls) -> str:
+      return "google_books"
+
+    @classmethod
+    def fetch_metadata(cls, isbn: str) -> BookMetadata | None:
+        try:
+            jsonInput = requests.get(
+                f"https://www.googleapis.com/books/v1/volumes",
+                params = {"q": f"isbn:{isbn}"},
+            ).json()
+            data = jsonInput.get("items")[0].get("volumeInfo")
+
+            authors = set(data.get("authors") or [])
+            title = data.get("title")
+            publishDate = data.get("publish_date")
+            numberOfPages = data.get("number_of_pages")
+            if numberOfPages:
+                numberOfPages = int(numberOfPages)
+            subjects = set(data.get("categories") or [])
+            languages = data.get("languages")
+        except Exception:
+            return None
+
+        return BookMetadata(
+            isbn = isbn,
+            title = title,
+            source = cls.metadata_source_id(),
+            authors = authors,
+            language = languages,
+            publish_date = publishDate,
+            num_pages = numberOfPages,
+            subjects = subjects,
+        )
+
+
+if __name__ == '__main__':
+    book_data = GoogleBooksFetcher.fetch_metadata('0132624788')
+    book_data.validate()
+    print(book_data)
--- a/worblehat/services/metadata_fetchers/OpenLibraryFetcher.py
+++ b/worblehat/services/metadata_fetchers/OpenLibraryFetcher.py
@ -0,0 +1,61 @@
+"""
+A BookMetadataFetcher for the Open Library API.
+"""
+
+import requests
+
+from worblehat.services.metadata_fetchers.BookMetadataFetcher import BookMetadataFetcher
+from worblehat.services.metadata_fetchers.BookMetadata import BookMetadata
+
+LANGUAGE_MAP = {
+    "Norwegian": "no",
+}
+
+
+class OpenLibraryFetcher(BookMetadataFetcher):
+    @classmethod
+    def metadata_source_id(_cls) -> str:
+      return "open_library"
+
+    @classmethod
+    def fetch_metadata(cls, isbn: str) -> BookMetadata | None:
+        try:
+            jsonInput = requests.get(f"https://openlibrary.org/isbn/{isbn}.json").json()
+
+            author_keys = jsonInput.get("authors") or []
+            author_names = set()
+            for author_key in author_keys:
+                key = author_key.get('key')
+                author_name = requests.get(f"https://openlibrary.org/{key}.json").json().get("name")
+                author_names.add(author_name)
+
+            title = jsonInput.get("title")
+            publishDate = jsonInput.get("publish_date")
+
+            numberOfPages = jsonInput.get("number_of_pages")
+            if numberOfPages:
+                numberOfPages = int(numberOfPages)
+
+            language_key = jsonInput.get("languages")[0].get("key")
+            language = requests.get(f"https://openlibrary.org/{language_key}.json").json().get("identifiers").get("iso_639_1")[0]
+            subjects = set(jsonInput.get("subjects") or [])
+
+        except Exception:
+            return None
+
+        return BookMetadata(
+            isbn = isbn,
+            title = title,
+            source = cls.metadata_source_id(),
+            authors = author_names,
+            language = language,
+            publish_date = publishDate,
+            num_pages = numberOfPages,
+            subjects = subjects,
+        )
+
+
+if __name__ == '__main__':
+    book_data = OpenLibraryFetcher.fetch_metadata('9788205530751')
+    book_data.validate()
+    print(book_data)
--- a/worblehat/services/metadata_fetchers/OutlandScraperFetcher.py
+++ b/worblehat/services/metadata_fetchers/OutlandScraperFetcher.py
@ -0,0 +1,109 @@
+"""
+A BookMetadataFetcher that webscrapes https://outland.no/
+"""
+
+from bs4 import BeautifulSoup
+
+import requests
+
+from worblehat.services.metadata_fetchers.BookMetadataFetcher import BookMetadataFetcher
+from worblehat.services.metadata_fetchers.BookMetadata import BookMetadata
+
+
+LANGUAGE_MAP = {
+    "Norsk": "no",
+    "Engelsk": "en",
+    "Tysk": "de",
+    "Fransk": "fr",
+    "Spansk": "es",
+    "Italiensk": "it",
+    "Svensk": "sv",
+    "Dansk": "da",
+    "Finsk": "fi",
+    "Russisk": "ru",
+    "Kinesisk": "zh",
+    "Japansk": "ja",
+    "Koreansk": "ko",
+}
+
+
+class OutlandScraperFetcher(BookMetadataFetcher):
+    @classmethod
+    def metadata_source_id(_cls) -> str:
+      return "outland_scraper"
+
+    @classmethod
+    def fetch_metadata(cls, isbn: str) -> BookMetadata | None:
+        try:
+            # Find the link to the product page
+            response = requests.get(f"https://outland.no/{isbn}")
+            soup = BeautifulSoup(response.content, "html.parser")
+            soup = soup.find_all("a", class_="product-item-link")
+            href = soup[0].get("href")
+
+            # Find the metadata on the product page
+            response = requests.get(href)
+            soup = BeautifulSoup(response.content, "html.parser")
+            data = soup.find_all("td", class_="col data")
+
+            # Collect the metadata
+            title = soup.find_all("span", class_="base")[0].text
+
+            releaseDate = soup.find_all("span", class_="release-date")[0].text.strip()
+            releaseDate = releaseDate[-4:] # only keep year
+
+            bookData = {
+                "Title": title,
+                "PublishDate": releaseDate,
+                "Authors": None,
+                "NumberOfPages": None,
+                "Genre": None,
+                "Language": None,
+                "Subjects": None,
+            }
+
+            dataKeyMap = {
+                "Authors": "Forfattere",
+                "NumberOfPages": "Antall Sider",
+                "Genre": "Sjanger",
+                "Language": "Språk",
+                "Subjects": "Serie"
+            }
+
+            for value in data:
+                for key in dataKeyMap:
+                    if str(value).lower().__contains__(dataKeyMap[key].lower()):
+                        bookData[key] = value.text
+                        break
+
+            if bookData["Language"] is not None:
+                bookData["Language"] = LANGUAGE_MAP.get(bookData["Language"])
+
+            if bookData["Authors"] is not None:
+                bookData["Authors"] = set(bookData["Authors"].split(", "))
+
+            if bookData["Subjects"] is not None:
+                bookData["Subjects"] = set(bookData["Subjects"].split(", "))
+
+            if bookData["NumberOfPages"] is not None:
+                bookData["NumberOfPages"] = int(bookData["NumberOfPages"])
+
+        except Exception:
+            return None
+
+        return BookMetadata(
+            isbn = isbn,
+            title = bookData.get('Title'),
+            source = cls.metadata_source_id(),
+            authors = bookData.get('Authors'),
+            language = bookData.get('Language'),
+            publish_date = bookData.get('PublishDate'),
+            num_pages = bookData.get('NumberOfPages'),
+            subjects = bookData.get('Subjects'),
+        )
+
+
+if __name__ == '__main__':
+    book_data = OutlandScraperFetcher.fetch_metadata('9781947808225')
+    book_data.validate()
+    print(book_data)
--- a/worblehat/services/metadata_fetchers/init.py
+++ b/worblehat/services/metadata_fetchers/init.py
@ -0,0 +1 @@
+from .book_metadata_fetcher import fetch_metadata_from_multiple_sources
--- a/worblehat/services/metadata_fetchers/book_metadata_fetcher.py
+++ b/worblehat/services/metadata_fetchers/book_metadata_fetcher.py
@ -0,0 +1,80 @@
+"""
+this module contains the fetch_book_metadata() function which fetches book metadata from multiple sources in threads and returns the higest ranked non-None result.
+
+"""
+
+from concurrent.futures import ThreadPoolExecutor
+
+from worblehat.services.metadata_fetchers.BookMetadata import BookMetadata
+from worblehat.services.metadata_fetchers.BookMetadataFetcher import BookMetadataFetcher
+
+from worblehat.services.metadata_fetchers.GoogleBooksFetcher import GoogleBooksFetcher
+from worblehat.services.metadata_fetchers.OpenLibraryFetcher import OpenLibraryFetcher
+from worblehat.services.metadata_fetchers.OutlandScraperFetcher import OutlandScraperFetcher
+
+
+# The order of these fetchers determines the priority of the sources.
+# The first fetcher in the list has the highest priority.
+FETCHERS: list[BookMetadataFetcher] = [
+    OpenLibraryFetcher,
+    GoogleBooksFetcher,
+    OutlandScraperFetcher,
+]
+
+
+FETCHER_SOURCE_IDS: list[str] = [fetcher.metadata_source_id() for fetcher in FETCHERS]
+
+
+def sort_metadata_by_priority(metadata: list[BookMetadata]) -> list[BookMetadata]:
+    """
+    Sorts the given metadata by the priority of the sources.
+
+    The order of the metadata is the same as the order of the sources in the FETCHERS list.
+    """
+
+    # Note that this function is O(n^2) but the number of fetchers is small so it's fine.
+    return sorted(metadata, key=lambda m: FETCHER_SOURCE_IDS.index(m.source))
+
+
+def fetch_metadata_from_multiple_sources(isbn: str, strict=False) -> list[BookMetadata]:
+    """
+    Returns a list of metadata fetched from multiple sources.
+
+    Sources that does not have metadata for the given ISBN will be ignored.
+
+    There is no guarantee that there will be any metadata.
+
+    The results are always ordered in the same way as the fetchers are listed in the FETCHERS list.
+    """
+    isbn = isbn.replace('-', '').replace('_', '').strip().lower()
+    if len(isbn) != 10 and len(isbn) != 13 and not isbn.isnumeric():
+        raise ValueError('Invalid ISBN')
+
+    results: list[BookMetadata] = []
+
+    with ThreadPoolExecutor() as executor:
+        futures = [executor.submit(fetcher.fetch_metadata, isbn) for fetcher in FETCHERS]
+
+    for future in futures:
+        result = future.result()
+        if result is not None:
+            results.append(result)
+
+    for result in results:
+        try:
+            result.validate()
+        except ValueError as e:
+            if strict:
+                raise e
+            else:
+                print(f'Invalid metadata: {e}')
+                results.remove(result)
+
+    return sort_metadata_by_priority(results)
+
+
+if __name__ == '__main__':
+    from pprint import pprint
+    isbn = '0132624788'
+    metadata = fetch_metadata_from_multiple_sources(isbn)
+    pprint(metadata)
--- a/worblehat/services/seed_test_data.py
+++ b/worblehat/services/seed_test_data.py
@ -1,4 +1,5 @@
 import csv
+from datetime import datetime, timedelta
 from pathlib import Path

 from sqlalchemy.orm import Session
@ -6,7 +7,11 @@ from sqlalchemy.orm import Session
 from worblehat.flaskapp.database import db

 from ..models import (
+    Author,
    Bookcase,
+    BookcaseItem,
+    BookcaseItemBorrowing,
+    BookcaseItemBorrowingQueue,
    BookcaseShelf,
    Language,
    MediaType,
@ -117,6 +122,100 @@ def seed_data(sql_session: Session = db.session):
        BookcaseShelf(row=0, column=4, bookcase=bookcases[4], description="Religion"),
    ]

+    authors = [
+        Author(name="Donald E. Knuth"),
+        Author(name="J.K. Rowling"),
+        Author(name="J.R.R. Tolkien"),
+        Author(name="George R.R. Martin"),
+        Author(name="Stephen King"),
+        Author(name="Agatha Christie"),
+    ]
+
+    book1 = BookcaseItem(
+        name = "The Art of Computer Programming",
+        isbn = "9780201896831",
+    )
+    book1.authors.add(authors[0])
+    book1.media_type = media_types[0]
+    book1.shelf = shelfs[59]
+
+    book2 = BookcaseItem(
+        name = "Harry Potter and the Philosopher's Stone",
+        isbn = "9780747532743",
+    )
+    book2.authors.add(authors[1])
+    book2.media_type = media_types[0]
+    book2.shelf = shelfs[-1]
+
+    book_owned_by_other_user = BookcaseItem(
+        name = "Book owned by other user",
+        isbn = "9780747532744",
+    )
+
+    book_owned_by_other_user.owner = "other_user"
+    book_owned_by_other_user.authors.add(authors[4])
+    book_owned_by_other_user.media_type = media_types[0]
+    book_owned_by_other_user.shelf = shelfs[-2]
+
+    borrowed_book_more_available = BookcaseItem(
+        name = "Borrowed book with more available",
+        isbn = "9780747532745",
+    )
+    borrowed_book_more_available.authors.add(authors[5])
+    borrowed_book_more_available.media_type = media_types[0]
+    borrowed_book_more_available.shelf = shelfs[-3]
+    borrowed_book_more_available.amount = 2
+
+    borrowed_book_no_more_available = BookcaseItem(
+        name = "Borrowed book with no more available",
+        isbn = "9780747532746",
+    )
+    borrowed_book_no_more_available.authors.add(authors[5])
+    borrowed_book_no_more_available.media_type = media_types[0]
+    borrowed_book_no_more_available.shelf = shelfs[-3]
+
+    borrowed_book_people_in_queue = BookcaseItem(
+        name = "Borrowed book with people in queue",
+        isbn = "9780747532747",
+    )
+    borrowed_book_people_in_queue.authors.add(authors[5])
+    borrowed_book_people_in_queue.media_type = media_types[0]
+    borrowed_book_people_in_queue.shelf = shelfs[-3]
+
+    borrowed_book_by_slabbedask = BookcaseItem(
+        name = "Borrowed book by slabbedask",
+        isbn = "9780747532748",
+    )
+    borrowed_book_by_slabbedask.authors.add(authors[5])
+    borrowed_book_by_slabbedask.media_type = media_types[0]
+    borrowed_book_by_slabbedask.shelf = shelfs[-3]
+
+    books = [
+        book1,
+        book2,
+        book_owned_by_other_user,
+        borrowed_book_more_available,
+        borrowed_book_no_more_available,
+        borrowed_book_people_in_queue,
+    ]
+
+    slabbedask_borrowing = BookcaseItemBorrowing(
+        username="slabbedask",
+        item=borrowed_book_more_available,
+    )
+    slabbedask_borrowing.end_time = datetime.now() - timedelta(days=1)
+
+    borrowings = [
+        BookcaseItemBorrowing(username="user", item=borrowed_book_more_available),
+        BookcaseItemBorrowing(username="user", item=borrowed_book_no_more_available),
+        BookcaseItemBorrowing(username="user", item=borrowed_book_people_in_queue),
+        slabbedask_borrowing,
+    ]
+
+    queue = [
+        BookcaseItemBorrowingQueue(username="user", item=borrowed_book_people_in_queue),
+    ]
+
    with open(Path(__file__).parent.parent.parent / 'data' / 'iso639_1.csv') as f:
      reader = csv.reader(f)
      languages = [Language(name, code) for (code, name) in reader]
@ -125,5 +224,9 @@ def seed_data(sql_session: Session = db.session):
    sql_session.add_all(bookcases)
    sql_session.add_all(shelfs)
    sql_session.add_all(languages)
+    sql_session.add_all(authors)
+    sql_session.add_all(books)
+    sql_session.add_all(borrowings)
+    sql_session.add_all(queue)
    sql_session.commit()
    print("Added test media types, bookcases and shelfs.")
Author	SHA1	Message	Date
Oystein Kristoffer Tveit	3c4f6ccf8c	models/BookcaseItem: make shelf non-nullable	2024-07-31 22:36:12 +02:00
Oystein Kristoffer Tveit	8161e5e92a	cli: make devscripts subcommand more accessible	2024-07-28 14:32:13 +02:00
Oystein Kristoffer Tveit	4e356f122a	models/migrations: redo initial migration	2024-07-28 14:12:45 +02:00
Oystein Kristoffer Tveit	f62011d6f7	pyproject.toml: add missing deps	2024-07-28 14:09:40 +02:00
Oystein Kristoffer Tveit	2242b3ce74	README: move issues from TODO list to gitea issue tracker	2024-07-27 23:14:27 +02:00
Adrian Gunnar Lauterer	b2432e782e	services/metadata_fetchers: init Co-authored-by: Oystein Kristoffer Tveit <oysteikt@pvv.ntnu.no>	2024-07-27 22:24:34 +02:00
Oystein Kristoffer Tveit	ec448c9f57	add more test data	2024-05-17 22:35:18 +02:00
Oystein Kristoffer Tveit	80fafbe3df	cli/prompt_utils: clear some bugs	2024-05-17 22:35:18 +02:00
Oystein Kristoffer Tveit	fa180ca354	cli/main: add command to show borrowed/queued items, move `list_bookcases` to advanced	2024-05-17 22:35:17 +02:00
Oystein Kristoffer Tveit	b3f80888d5	cli/search: clear some bugs	2024-05-17 22:35:17 +02:00
Oystein Kristoffer Tveit	77175cbb3a	cli/bookcase_item: add command to extend borrowing	2024-05-17 22:35:17 +02:00
Oystein Kristoffer Tveit	36ddc59253	flake.nix: add support for more architectures + misc	2024-04-29 00:16:21 +02:00
Oystein Kristoffer Tveit	d999d6710c	README: add further notes on future work with online sources	2024-01-14 03:58:22 +01:00
Oystein Kristoffer Tveit	d678b1f525	cli: implement slabbedasker	2024-01-14 03:55:36 +01:00
Oystein Kristoffer Tveit	1e3a24f575	fix csv test data spacing issue	2024-01-14 03:54:59 +01:00
Oystein Kristoffer Tveit	832c95198d	flake.nix: add devShell	2024-01-14 03:41:58 +01:00
Oystein Kristoffer Tveit	03f221a807	misc: small formatting and error checking improvements	2024-01-14 03:41:40 +01:00
Oystein Kristoffer Tveit	369180ff85	deadline-daemon: implement remaining pieces	2024-01-14 03:40:27 +01:00
Oystein Kristoffer Tveit	1550c1f2e3	Add scripts to seed data for testing + misc	2024-01-14 03:39:16 +01:00
				`@ -0,0 +1 @@`
				`from .book_metadata_fetcher import fetch_metadata_from_multiple_sources`